This subsection provides an example that motivates us to introduce the glocal control structure to be presented.
We here consider the network system illustrated in Fig. REF  representing a power grid [1]} where each component's dynamics is given as a second-order system.
For \(k=1,\ldots ,9\) , each component \(\Sigma _{[k]}\)  is given by
\(\Sigma _{[k]}: m_{[k]}\ddot{\theta }_{[k]}+d_{[k]}\dot{\theta }_{[k]}+v_{[k]}+u_{[k]}=0,\quad y_{[k]}=\omega _{[k]}\) 
